1. Department of Pediatrics, University of Utah, Salt Lake City, Utah
2. Department of Medicine, University of Utah, Salt Lake City, Utah
3. School of Medicine, University of Utah, Salt Lake City, Utah
4. Clinical Microbiology Laboratories, Primary Children's Medical Center, Salt Lake City, Utah
5. Department of Pediatrics and Microbiology, Baylor College of Medicine, Houston, Texas
6. Department of Pathology, University of Utah, Salt Lake City, Utah